Clevis



(No'ModeL) .F. S. .DIlVION.-

GLEVIS.

No. 355,980. Patented an. 11, 1 887 V lfiventmf flank 311E712 072 f a4PM witnesses FFlCIi.

i ATENT FRANK S. DIMON, OF FORT SCOTT, KANSAS.

CLEVIS.

SPECIFICATION forming part of Letters Patent No. 355,980, dated January11, 1887. Application filed May 14, 1886. Serial No. 202,197. (Nomodel.)

To all whom it may concern.-

Be it known that I, FRANK S. DIMON, a citizen of the United States,residing at Fort Scott, in the county of Bourbon and State of Kansas,have invented certain new and useful Improvements in Olevises; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same, reference being had to theaccompanying drawings, and to letters or figures of reference markedthereon, which form a part of this specification.

This invention relates to clevises', and particularly to that classwhich are provided with a locking. device for the clevis-pin to keep itfrom dropping or working out; and theobject of the invention is toprovide a clevis with a locking device which shall be easy to use andcertain in its operation.

The invention consists in theimproved looking clevis-pin, as hereinafterfully described and claimed, the essential features of which are a pinhaving a fixed lug at the bottom and a movable spring-pressed lug at thetop, the two being on opposite sides of the pin, the head of the pinbeing made in two parts, one part fixed to the pin, while the other isan extension of the movablelug, by means ofwhich the lug can beretracted.

In the accompanying drawings, Figure 1 shows a side elevation of aclevis with the pin in place. Fig. 2 is an end view showing the pinpassed through the eyes of the clevis and turned onequarter round toillustrate the manner of inserting the pin. Fig. 3 is a detachedperspective view of the clevis-pin: Fig. 4 is a plan view from above ofthe clevis-pin head. Fig. 5 is a side view of the head of the pin, takenin section on the line :0 m in Fig. 4.

A is a plow-clevis, constructed in the usual way, each of its endshaving the customary pear-shaped holes a and a, for the passage of theclevisfpin, or the openings may be of any shape that will allow a pinhaving aside projection or lug to pass through.

B is the clevis-pin, having a V-shaped lug, G, formed on one side at thebottom, thus making its cross-section at that point like the holes a anda. The head 0 is formed, as

above stated, of the fixed part c and the movable part c. The pin isgrooved longitudinall y through the part 0, the groove extending a shortdistance below the shoulder b of the head. In this groove is fitted atongue, D, carried by the part 0' of the head, which tongue has a slot,H, through which the pin f passes, and which also receives the spring E,inserted between the pin f and the bottom end of the slot, and thusoperating to press the piece 0 downward. On the bottom of the part 0there is a V-shaped projection or lug, G, coming on the opposite sideand end of the clevis-pin from the lug G. On the outside of the part cis formed a thumb-piece, g, for convenience in operating the device. Toinsert the pin, it is dropped through the hole a, thelugG passingthrough the V-shaped side of the opening, and then through hole a untilthe lug G strikes the clevis, when, by pushing on the head, the bottomlug, G, will pass through the hole a, the movable part of the headcarrying thelug G yielding through the spring. Then, by turning theclevis-pin half-way round, the lug G will come in line with the V-shapedside of the hole a and will drop into it, and be held there by thespring, thus locking the pin so that it cannot be turned until the lug Gis retracted by hand, the lug G preventing the pin from being withdrawnuntil the pin is turned half round.

To remove the pin, the lug G is withdrawn by means of the thumb-piece gand the clevispin turned half round, when it can be pulled out.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. The combination, with a clevis having holes in the end thereof for aclevis-pin, of a pin having a lug at the bottom adapted to pass throughthe holes of the clevis and to engage with the clevis when the pin isturned, so that the pin cannot be withdrawn, and a springpressed movablelug at the head of the pin adapted to fit into the upper hole of theclevis by the side of the pin to prevent the pin from being turned,substantially as and for the purpose set forth.

2. The combination, with a clevis having the holes a and a, of theclevis-pin having the the opposite side of the pin from the lug G, 10

and a thumb-pieee, 9, all substantially as and for the purpose setforth.

In testimony whereof I affixmy signature in presence of two witnesses.

FRANK S. DIMON.

WVitnesses:

J. P. CAMPBELL, W. H. WEBB.

